I have a query , we have enabled ip route cache flow on the main ATM IMA interface and we have few subinterfaces configured in it.While looking at the output of ip cache flow I see the source IP add & source interfaces to be different i.e. in the below example 172.18.96.0/22 is a subnet which resides behind AT0/IMA0.75 but I see this subnet as a source / destination IP through a different sub-interfaces.As per the network setup there is no other link for the other sub-interfaces to reach the mentioned subnet.
below is one sample output , we see lot of traffic as highlighted below
AT0/IMA0.776 172.18.96.115 Gi0/0.1 172.18.9.64 06 047D 0882 1 - In this example the mentioned IP should not reflect the source interface as Ima.776 rather it should b only IMA.75 as below.
AT0/IMA0.75 172.18.96.115 Gi0/0.1 172.18.9.64 06 047D 0887 1 - this is right information
AT0/IMA0.779 172.18.11.15 AT0/IMA0.75 172.18.96.186 06 0CF6 0050 1 - this is right inforamtion
no ip address
ip route-cache flow
logging event subif-link-status
ima clock-mode common 0
ima differential-delay-maximum 150
atm vc-per-vp 1024
no atm ilmi-keepalive
we have these many subinterfaces.ATM0/IMA0.75 is the connection to hub site and the rest are the spoke sites connecting to this router lastly this router is the only transit to reach the hub router.
No routing issues as the route table looks completly good.